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Paha777 [63]
3 years ago
6

Add parenthesis to the expression 8-4 / 2 * 10 so that it equals 20

Mathematics
1 answer:
Fiesta28 [93]3 years ago
4 0

Answer:

Hope this helps you mate ♪\(*^▽^*)/\(*^▽^*)/♪\(*^▽^*)/\(*^▽^*)/♪\(*^▽^*)/\(*^▽^*)/♪\(*^▽^*)/\(*^▽^*)/♪\(*^▽^*)/\(*^▽^*)/♪\(*^▽^*)/\(*^▽^*)/

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A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting. It is
yan [13]

Answer:

No, there is not sufficient evidence to support the claim that the bags are underfilled

Step-by-step explanation:

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting.

This means that the null hypothesis is:

H_{0}: \mu = 434

It is believed that the machine is underfilling the bags.

This means that the alternate hypothesis is:

H_{a}: \mu < 434

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

434 is tested at the null hypothesis:

This means that \mu = 434

A 9 bag sample had a mean of 431 grams with a variance of 144.

This means that X = 431, n = 9, \sigma = \sqrt{144} = 12

Value of the test-statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{431 - 434}{\frac{12}{\sqrt{9}}}

z = -0.75

P-value of the test:

The pvalue of the test is the pvalue of z = -0.75, which is 0.2266

0.2266 > 0.01, which means that there is not sufficient evidence to support the claim that the bags are underfilled.

7 0
3 years ago
Solve the system using elimination
saul85 [17]
2x + 3y = 9
x + 5y = 8....multiply by -2
----------------
2x + 3y = 9
-2x - 10y = -16 (result of multiplying by -2)
---------------add
-7y = - 7
y = -7/-7
y = 1

x + 5y = 8
x + 5(1) = 8
x + 5 = 8
x = 8 - 5
x = 3

solution is (3,1)
7 0
3 years ago
Angle MNP ~ Angle HJK. <br> Both triangles are isosceles. if m
valina [46]

Answer:

Angles H, J, M, N

Step-by-step explanation:

Since m<p is 90 degrees it must be the largest angle so both triangles have angle 45-45-90. m<P is equal to m<K. This means that angle h, j, m, and n are equal.

6 0
2 years ago
Read 2 more answers
WILLL GIVE BRAINLLIST PLZZZZZZZZ HELP !! ASAP I NEED YALL!!
zhannawk [14.2K]

Answer:

The answer is C. Hope this helps!

Step-by-step explanation:

7 0
3 years ago
Evaluate <br> 8w - 2v if w = 5 and v = 3
vampirchik [111]

Answer:

=34

Step-by-step explanation:

.........................

4 0
3 years ago
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